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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Advice needed Case 207 engine

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DarylC

02-28-2008 07:10:29




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I've just finished putting a sleeve/piston kit in a Case 580D backhoe with 207 engine. While I had the head off, air filter canister removed, etc., I pulled the fuel tank, drained it and cleaned all the sediment out it. I also removed both fuel filters and replaced them with new ones. I've got it all together now, and the fuel system is basically dry with the exception of whatever diesel remained in the pump (probably not much, it dripped a bunch out of the overflow port). I'd like to spin the engine with the valve cover off, and make sure I see it pumping oil to the rockers before I open the tank petcock, and try to get it started. I hope this isn't a stupid question, but will I do any damage to the injection pump, injectors, etc by spinning the motor without any diesel in the fuel system? thanks in advance, Daryl

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JFoshee

03-01-2008 17:04:17




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 Re: Advice needed Case 207 engine in reply to DarylC, 02-28-2008 07:10:29  
Another option is to take a small pump, like the ones you turn with a drill, and rig it to an oil port on your engine. This way you prelube the entire engine and you can see if your rockers are getting oil. I had a set up like this years ago when I did mechanic work full time. I will admit that just cranking the engine over is a lot simpler, just thought I"d mention it.



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John Van Valkenburgh

02-28-2008 19:33:28




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 Re: Advice needed Case 207 engine in reply to DarylC, 02-28-2008 07:10:29  
Daryl,

You got a very good response from PD, I would only add that I'd first make sure to open up the line on the secondary fuel filter and let all the air out first. Your 207 should be much like my 188 which has a gravity feed system. I've noticed that it takes a lot of time for the fuel to eventually bleed out all the air.

When I rebuilt my 188 I put everything together but left the fuel lines disconnected at the injectors. I then cranked over the engine watching for fuel on all four lines. Only took a few turns of the engine.

I did not leave the valve cover off to look for oil on the rockers. Thats a good idea. I'd spin the engine till there is fuel coming out the injector lines then pull the fuel shutoff to keep from having a mess. I'd think you'd see oil on the rockers eventually, but with a new oil filter and all it may take a fair amount of cranking.

You might consider purging the air out of the fuel lines, then connecting the injectors and actually starting the engine, looking for oil to make its way to the rockers within 8-10 seconds or so.

Best of luck,
John
1968 Case 450

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PD Mechanical

02-28-2008 07:51:12




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 Re: Advice needed Case 207 engine in reply to DarylC, 02-28-2008 07:10:29  
Daryl: The injection pump depends on the fuel for lubrication. The residual fuel would PROBABLY be enough to prevent damage but why take the chance. Although I am not real familiar with the shut off system on the 580's, I'm sure it has either a mechanical shut off or an electric. By holding the mechanical version in the off position or leaving the wire disconnected on the electric version you will prevent the engine from starting. This way you can turn the fuel on at the tank and prime the pump to avoid any possible damage. If you have any other questions or need parts feel free to email me directly at sales@pdmechanical.com. Good luck. Steve

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